Mila Kunis and Ashton Kutcher may play coy about their relationship to the public, but there was no question they were together Friday night at the Lion. The former “That ’70s Show” co-stars had dinner at the cluby West Village eatery Friday night and were “very affectionate and touchy-feely” the whole time. Source told us the casually dressed duo, who held hands throughout the meal, stayed at the restaurant for four hours before leaving close to 1 a.m.